EP 3702485 A4 20210303 - NICKEL-CONTAINING STEEL FOR LOW-TEMPERATURE USE
Title (en)
NICKEL-CONTAINING STEEL FOR LOW-TEMPERATURE USE
Title (de)
NICKEL ENTHALTENDER STAHL FÜR TIEFTEMPERATURANWENDUNG
Title (fr)
ACIER COMPRENANT DU NICKEL POUR BASSE TEMPÉRATURE
Publication
Application
Priority
JP 2017038615 W 20171026
Abstract (en)
[origin: EP3702485A1] A nickel-containing steel for low temperature according to an aspect of the present invention has a chemical composition within a predetermined range, in which a metallographic structure of a thickness middle portion contains 2.0 vol% to 20.0 vol% of an austenite phase, an average grain size of prior austenite grains is 3.0 µm to 15.0 µm, an average aspect ratio of the prior austenite grains is 1.0 to 2.4, a plate thickness is 4.5 mm to 30 mm, the chemical composition and the average grain size of the prior austenite grains are further limited depending on the plate thickness, a yield stress at room temperature is 460 MPa to 710 MPa, and a tensile strength at the room temperature is 560 MPa to 810 MPa.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - US); C21D 6/004 (2013.01 - EP US); C21D 8/0205 (2013.01 - KR); C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/08 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/16 (2013.01 - EP US); C22C 38/42 (2013.01 - EP KR); C22C 38/44 (2013.01 - EP KR US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP US); C22C 38/54 (2013.01 - EP KR US); C21D 2211/001 (2013.01 - US); Y02E 60/32 (2013.01 - EP)
Citation (search report)
- [A] WO 2015064045 A1 20150507 - JFE STEEL CORP [JP]
- [A] EP 2743363 A1 20140618 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] WO 2017104599 A1 20170622 - KOBE STEEL LTD [JP] & EP 3392361 A1 20181024 - KOBE STEEL LTD [JP]
- [A] JP 2016044332 A 20160404 - NIPPON STEEL & SUMITOMO METAL CORP, et al
- [A] JP 2016176141 A 20161006 - JFE STEEL CORP
- See references of WO 2019082322A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3702485 A1 20200902; EP 3702485 A4 20210303; EP 3702485 B1 20211222; CN 111247263 A 20200605; CN 111247263 B 20211228; JP 6852804 B2 20210331; JP WO2019082322 A1 20201105; KR 102309124 B1 20211006; KR 20200062303 A 20200603; US 11371127 B2 20220628; US 11578394 B2 20230214; US 2020308678 A1 20201001; US 2022282362 A1 20220908; WO 2019082322 A1 20190502
DOCDB simple family (application)
EP 17929735 A 20171026; CN 201780096211 A 20171026; JP 2017038615 W 20171026; JP 2019549761 A 20171026; KR 20207012777 A 20171026; US 201716758010 A 20171026; US 202217751338 A 20220523